DocumentBufferStrategyHeapSize.java

package org.apache.blur.mapreduce.lib;

import java.util.List;

import org.apache.blur.utils.RamUsageEstimator;
import org.apache.hadoop.conf.Configuration;
import org.apache.lucene.document.Field;

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

public class DocumentBufferStrategyHeapSize extends DocumentBufferStrategy {

  private final long _maxDocumentBufferHeapSize;
  private long _currentHeapSize;

  public DocumentBufferStrategyHeapSize(Configuration configuration) {
    super(configuration);
    _maxDocumentBufferHeapSize = BlurOutputFormat.getMaxDocumentBufferHeapSize(configuration);
  }

  @Override
  public boolean isFull() {
    return _currentHeapSize >= _maxDocumentBufferHeapSize;
  }

  @Override
  protected void newDocument(List<Field> document) {
    _currentHeapSize += RamUsageEstimator.sizeOf(document);
  }

  @Override
  public List<List<Field>> getAndClearBuffer() {
    List<List<Field>> docs = super.getAndClearBuffer();
    _currentHeapSize = 0;
    return docs;
  }

}